The potential applied to a 20-? resistor is v = (60 V) cos(33t). What is the rms current through this resistor?
What will be an ideal response?
2.1 A
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Freddy Frog drops vertically from a tree onto a horizontally-moving skateboard. The reason he doesn't slip off the skateboard is due to
A) inertia in motion. B) momentum change. C) friction between his feet and the board.
The further away a galaxy is:
A) the older it is. B) the further ahead in the future it will exist. C) the longer ago it existed. D) the larger it appears. E) the more massive it is.
Processed meteorites with low metal content probably are
A) leftover chunks of rock from the earliest period in the formation of the solar system. B) pieces of comets rather than of asteroids. C) chunks of a larger asteroid that was shattered by a collision. D) chunks of rock chipped off the planet Mercury. E) chunks of rock chipped off the planet Mars.
Consider an ideal gas at 1.0 atmosphere in a closed container. If the temperature changes from 300. K to 450. K, the final gauge pressure will be
A) 0.5 atm. B) 4.5 atm. C) 1.5 atm. D) 3.0 atm. E) 21. psi.